Excavation (Archaeologists Toolkit)
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Archaeologists have previously discovered evidence of a fire on the site, after which, a floor was laid inside the gate. It looks as if the gate was inhabited after the fire, says Holm. The archaeologists currently think that the moat and the east gate were constructed during the latter half of the 10th century.
This is also around the time it burnt--albeit the fire was not strong enough to cause a collapse. The craftsmen presumably lived very well, whether he used the east gate as a home or a workshop. It was 30 to 40 square metres of space and had its own fireplace--and of course, the toolbox with the valuable iron tools.
We only discovered the outline of the posts, suggesting that the rest simply rotted away. Some of them stood out clearly on the CT-scan. The next step is to x-ray the objects in the toolbox. This should help Holm to work out exactly what they are. The studies will continue for several weeks to come. Archaeologists are investigating the items individually while taking care to preserve them so they can be put on display next year. Read the Danish version of this article on Videnskab.
Nanna Holm Viking Castle Borgring. Archaeologists are excited as new finding could reveal more secrets about the Danish vikings. A few months ago, the find of a hidden ringfort in Denmark created great excitement among archaeologists all over the world. Now archaeologists have finally concluded that it is, in fact, a Viking fortress. But was it Harald Bluetooth's? A new archaeological excavation in Denmark reveals the remains of graves and buildings that span the Stone Age, Bronze Age, the Vikings, and right up to the Middle Ages. A particular type of wax that accumulates on the surface of plant root cells is vital for their nutrient balance, new study shows.
The results truly challenge the way we think about plant growth and plant root adaptations. Usually, to save time and money, the archaeologists only test a sample of the area. A surface survey is a systematic examination of the land. A team of archaeologists will walk in straight lines back and forth across the study area.
Get the Job
As they walk, they look for evidence of past human activity, including walls or foundations, artifacts, or color changes in the soil that may indicate features. They will use a compass and long tape measure to make sure they walk in a straight line and will record the exact location of all evidence they find. They collect any artifacts and put them in bags with a label of their exact location. Features on the surface, which they cannot remove, are photographed and drawn. Shovel test pits or STPs are a series of narrow holes dug in an area that archaeologists believe to be a potential site, revealing artifacts or features.
Archaeologists usually dig test pits where the ground has not been farmed or plowed and it contains a lot of surface vegetation. They may screen sift the soil to recover small artifacts and often draw profiles of the test pits to record what the soil looks like in each hole. There are non-invasive techniques archaeologists can use to find sites without digging.
Examples of geophysical surveys that do not disturb the soil include magnetometry, resistivity, and ground-penetrating radar. After conducting a survey, archaeologists will have enough information to determine if any significant archaeological sites are in the study area. They may or may not find a site. Or, the sites may or may not be "significant" as defined by the law in the National Historic Preservation Act. Regardless, the archaeologist will write and file a site report with the State Historic Preservation Office, which describes their research.
If they found significant sites, they might plan further excavations. Believe it or not archaeologists rarely excavate dig entire sites! Archaeology is a destructive science—meaning that once a site is excavated, it is gone forever. The artifacts and information gathered remain, but the site itself can never be recreated. Excavating sites is also costly and time-consuming. Once the dig is done, archaeologists have a professional responsibility to analyze all the artifacts and information obtained, to report on their research, and to curate the collections.
For these reasons, archaeologists generally excavate only when there is a threat of destruction or when they may reveal vital information about past cultures. And they usually excavate only a small part of any site. Although archaeologists work on all kinds of environments around the world, they follow the same basic process when planning an excavation.
Before an excavation begins, archaeologists write a research design. This outlines the "who, what, where, when, how, and why" of the fieldwork. Archaeologists must submit this important document for review before gaining permission to excavate a site. In the U. If an American archaeologist wants to work in a foreign country, permission must be granted by the appropriate agency in that government. Tribal American Indian lands in the U.
Once a research design receives approval and permits, a team gathers the necessary people and tools. Archaeologists must record the exact location of all artifacts and features on a site. Before removing any soil or artifacts from a site, they create a site grid.
They establish a datum point, or fixed reference point for all measurements. Then they superimpose a rectangular grid over the whole site. They measure each square in the grid and assign it a number. These squares are often referred to as units. This system allows the archaeologist to create a precise map and to record the exact location of all the features and artifacts on the site. Archaeologists use a statistical sampling method to select which squares or units they will excavate.
To begin, they will collect surface artifacts, then remove any ground vegetation. Archaeologists screen all soil removed from a unit to recover small artifacts and ecofacts. They record exact location, both horizontally and vertically, of all materials recovered. They store artifacts from each unit in secure bags labeled with the site and excavation unit numbers and level. The unit may be dug in arbitrary levels such as every 10 cm or by following the natural stratigraphy layers of the soil. Stratigraphy is the study of geological or soil layers.
Over time, both natural processes like the decay of organic matter, and cultural processes caused by humans , create soil layers. The cross section of these soil layers resembles a layer cake. The oldest layers are on the bottom and the most recent layers are on the top.
What do Archaeologists do
This is called the Law of Superposition and is one of the most important principles in archaeology. Archaeologists can use stratigraphy to determine the relative age of each layer and its contents. Archaeologists spend much more of their time in the laboratory analyzing artifacts and data than they do in the field.
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Archaeologists analyze artifacts, features, and other information recovered in the field to help answer their research questions. During the investigative process, they might seek to learn when people occupied the site, the purpose of the objects recovered, what the people ate, the kinds of structures they built, with whom they traded, and much more. Plumb bobs are used in conjunction with the measuring tape while mapping in order to provide a precise location for any feature boundary or artifacts that may be in the walls or floor of a unit.
Film and digital cameras are used at New Philadelphia in order to take official images of the floor and walls of each level of each excavation unit, artifacts, and occasionally candid shots of the crew. A transit or total station is a computer-like tool used in surveying an archaeological site though architects and civil engineers use them as well. This equipment is used to create a map of the site, using GPS and spatial data which records exact locations and heights of specific points. A basic soil core is a small metal tube with a handle at the top that is used for probing specific areas in the soil in search of buried artifacts or features.
Once a specific spot is marked for coring, the archaeolgist pushes the core into the ground using their body weight, then pulls it back out to inspect the soil within it. If artifacts or a significant soil change is present, that area may be a good prospect for excavation. Soil cores are also useful in locating sub-soil foundations; if a number of cores in a row were stopped by hard resistance, it is likely there is a feature buried in that location.